The VIPER20 from STMicroelectronics is a versatile integrated power IC that combines a dedicated current mode PWM controller with a high voltage power MOSFET on the same silicon chip. Featuring robust performance and compact design, it is particularly suitable for switch mode power supplies (SMPS), and it can be used in a wide range of applications, including adapters, chargers, and auxiliary power supplies.

Key Features

• Integrated PWM controller and 700V MOSFET
• Low power consumption under standby conditions
• Wide supply voltage range (9V to 38V)
• Current mode operation for excellent audio rejection and fast response to load steps
• Internal start-up timer for consistent operation
• Soft-start to reduce stress on the MOSFET during startup
• Overvoltage, overload, and thermal protection for enhanced reliability
• Frequency jittering for reduced EMI

Applications

The VIPER20 is designed to cater to a variety of applications that require efficient power conversion. This includes but is not limited to:

• AC/DC converters for consumer electronics
• LED lighting drivers
• Standby and auxiliary power supplies for white goods and home appliances
• Industrial power supplies
• SMPS for battery chargers and adapters

Advantages

Utilizing the VIPER20 allows designers to create power supplies that are reliable, efficient, and have a smaller footprint due to the integration of multiple functions into a single chip. Its built-in protections ensure long-term stability and safety of the end application, while the frequency jittering feature helps in meeting stringent EMI regulations. The VIPER20 is an excellent choice for power supply solutions where space, cost, and power efficiency are critical considerations.